prediction.arbitrage
ActiveTool of Syenite
Scans trending markets on both Polymarket and Kalshi simultaneously, matches markets covering the same underlying question, and surfaces pairs where implied probabilities diverge by more than a threshold. A divergence of 5pp or more suggests one exchange is mispriced or lagging. Returns pairs ranked by divergence, each showing the YES probability on each exchange, which side is higher, and the spread in percentage points. Optionally pass minDivergencePp (default 3) to filter only meaningful gaps, and limit (default 20, max 50). Note: cross-exchange arb requires accounts on both platforms and faces execution risk — prices may converge before orders fill.
Parameters schema
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"limit": {
"type": "integer",
"maximum": 50,
"minimum": 1,
"description": "Max opportunities to return (default 20, max 50)"
},
"minDivergencePp": {
"type": "number",
"minimum": 0,
"description": "Minimum probability divergence in percentage points to surface (default 3)"
}
}
}No endpoints wrapped at confidence ≥ 0.50.
Parent server
Syenite
https://github.com/syenite-ai/syenite
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